I shot one a couple weeks ago with my ar 15 in 204 ruger. I used a hand loaded 26 grain Varmit Grenade Bullet. BarnesBullets Claims they Vaporise Gophers! I am happy to report they do! Bullet impact was from around 60 yards, Gopher flew 6feet in the air. Largest piece was a fur strip 4 inch long and a half inch wide! Sorry if this offends some users! Beleive me it was more humane than trapping. The Gopher didnt know what hit it!
"Licensed to Kill Gophers Bye the United Nations" AKA. Bill Murry from "CaddyShack"